i7 4770k overclocking settings for stability.. HELP PLEASE!

I just put together a build this week and it's my first time ever overclocking. I'm having some trouble figuring out a good OC/Voltage setting for my 4770k // ASUS Maximus VI Hero mobo.

When i first started i set the multiplier to 40x and left Voltage to Adaptive but during the Prime95 stress test it says my voltage is 1.28v. i know that's way too high. when i set the v to say 1.18 it will run fine @ 4.2ghz for about 5-10mins in Prime95. upping the v to 1.2 does about the same. heck i even set the v to 1.25 and @ 4.4ghz as soon as i apply the settings in AISuiteIII it's instant BSOD or hard lock. leave voltage to adaptive and set the cpu to 4.2ghz and it ran for about 20mins until i stopped the test but that was still showing 1.28v.

I installed a Noctua NH-D14 and temps were 25C idle and 64C max and around 55C average under full load. Like I said im very new to overclocking and although i would really like to see what this chip can do i basically just want a good 4.2ghz or so setup. I dont like the fact that in manual voltage it stays at that same voltage 24/7 (that can't be good right?) whereas adaptive lowers the voltage at idle and low loads.

I also have OC'ed 1866 memory too but oddly when i installed them into my mobo and booted up for the first time BIOS picks them up as 1600mhz, I then set them to 1866 and enable XMP profile1 in BIOS.

I am also using the onboard Intel graphics too as my 780TI wont be here til Monday or Tuesday. Could that have something to do with instability with the extra resource draw?

Prime95 is the only program i've used to test this system so far. i have read that sometimes prime will crash ur system but on everyday use and gaming/programs it might not crash even at 100% cpu usage. Would ROG RealBench be better for testing OC's? maybe i should reset the BIOS and try over again (if u can actually do that)

I know it's alot of questions but i am a n00b at this stuff and hoping some of u smarter ones will guide me through this and make it as painless as possible hehe ;)

PS Extreme Tweaking is Enabled in the UEFI too

here is my system:
i7 4770k
ASUS Maximus VI Hero Z87
Gskill Ripjaws X 2x4GB (8GB) 1866
Noctua NH-D14
ASUS 780TI (monday, onboard grafx for now)
Corsair HX750
Samsung PRO 256GB SSD
WD BLACK 1TB 7200rpm
Cooler Master 922
5 answers Last reply Best Answer
More about 4770k overclocking settings stability
  1. Watch this guide and learn how to overclock:
  2. I Tried that but on my BIOS screen you cant change the voltage manually to 1.2 like he just did. there is no way to enter any values for CPU Core Voltage. In the video it says fully manual mode above that but mine doesnt have that. also underneath CPU Core Voltage when i set to Manual is CPU Core Override (i guess that is what i change?). which i set to 1.20v. with a multiplier of 46 the pc froze at the windows loading screen. then i just went into the UEFI and set CPU Level Up to 4.2 and reset my ram to 1866 and XMP profile 1. ran a good 20 mins on Prime95 before i stopped the test so i think that should be ok. the only thing is i don't know what voltage and settings it changed to get 4.2 as in AISuiteIII it still shows 1.28v with adaptive voltage on. also since i finished this build i noticed the core temps on the 4770k are way apart from each other. the first core is always the hottest, followed by the 2nd, so on and the 4th core is usually 10C cooler than the first core. is that normal? max temp on core1 was 64 in the test but core4 was only 54
  3. Best answer
    you need to take your time finding the right voltage, you know 1.28v works for 4.2ghz so start decreasing voltage by .02 so bring it down 1.26v next and test at 4.2ghz and see if its stable if it is then try decrease by another 0.2v and test again until you crash and move back up to your last stable voltage then you've found minimum voltage for your clock speed it may sound like effort but its worth it ,
    don't use prime95 or intel burn test with adaptive voltage enabled it will draw higher voltage than you set in bios if you want to stress test with adaptive voltage use RoG realbench,
    its not a problem leaving the voltage at a constant setting all it will reduce iif adaptive is power usage by a small bit and reduce your idle temperature
  4. +1 for kiezz

    Overclocking and reaching stable overclocking is a time taking process. If you are still not sure, the safest way for a moment is to use the four way optimization of AISuite software. Let that software handle the overclocking of your system. Once done, save the settings in UEFI BIOS in a profile. Read the values and learn which values gives you stable overclock.

    Meanwhile learn the overclocking using many guides available and watching vids. Visit and read their overclocking guide. In manual overclocking you'll have to go step by step till system is stabilized. Once you know the basics and your UEFI BIOS then you can better tune your system.

    Don't just jump over it.

    Note: It is not necessary to achieve 4.5 4.6 or so with every CPU. Every chip is different and how much it can be overclocked to can't be ascertain unless overclocked.
  5. Thanks for your help guys. i like the testing better in RealBench imo. it's more like what i would use the pc for in everyday use. I reset my BIOS to default and started at stock 3.9ghz and changed the multiplier to 42 and left the voltage on auto in bios and it has adaptive checked in AISuiteIII and during the test my voltage maxed out @ 1.248v. I ran it several times over and max temps with OpenHardwareMonitor was 63C on the first core and most of the test averaged around 47-55C. I kept going til i tried a multiplier of 44 and test passed the image part but pc restarted itself a couple seconds into the encoding test.

    Oh well i guess that means i got one of the lower end 4770ks i guess. I was never gonna run the pc at max OC anyway i was just curious as to what it would do. I dont think you could ever tell the difference from 3.9-4.2Ghz in a game or program anyway. and it's especially not worth the extra heat and voltage for me even though the Noctua seems to do a beastly job cooling this thing.

    i'll prob just leave it at 4.2 @ 1.248v. temps in OpenHM fluctuated rapidly but in AISuite even during intense stress the temp in AI hovered around 42-45Cmax (32C motherboard). i don't know which one i should believe is the real temp though.

    and i'm still wondering about the big temp differences across the cores is that normal. diff between core 0 and 3 are almost always 10C. I applied a pea size drop in the middle of the cpu and tightened the 2 bolts on the cooler a little at a time so it would seat evenly and i wonder if my installation of the cpu/cooler has something to do with the big core temp difference.

    BTW i just noticed on my old system (Phenom IIx4 965 BE @ stock 3.4) the vcore says 1.296v! that is awful high but i've been using it for what 4 years now like that and it runs 24/7 365. just as i plan to use my new build to run all the time.
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